LED
Meaning
Remedy
Off
No error
–
Flash-
es red
Invalid configuration, general configura-
tion error, a status change specified by
the master is not possible.
–
Eliminate configuration error.
Flash-
es
red
1)
Local error, the slave device application
independently changed the EtherCAT
status. This can have the following
causes:
–
A host watchdog time-out occurred.
–
Synchronisation error, the device
changes automatically into the safe-
operational status.
–
Flash-
es
red
2)
A process data watchdog time-out
occurred.
–
1) Single flash: single short flashing (1x flash, pause, 1x flash, etc.)
2) Double flash: double short flash (2x flash, pause, 2x flash, etc.)
Tab. 82 LED error
EtherCAT, LED LINK/ACTIVITY; connection status at XF1 IN and XF2 OUT
LED
Meaning
Remedy
Off
There is no network connection.
–
Check network connection.
Flick-
ers
green
(appr-
ox.
10 Hz)
Data traffic ongoing (traffic).
–
Lights
up
green
Network connection is OK (link).
–
Tab. 83 LED at XF1 IN and XF2 OUT
9.1.4
Device and interface status ProfiNet
PROFINET LED displays (only CMMT-AS-...-PN)
The NF LEDs on the front side, together with the 4 LEDs on the upper side, display the bus/network
status.
PROFINET, LED NF; bus error
Malfunctions
83
Festo — CMMT-AS-C2/C4-3A-... — 2018-02
